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US 2021/0231872 A1Published application
Retroreflective fiber endcap
AssigneeLumentum Operations LLC
InventorsMartin H. MUENDEL, Richard D. FAULHABER, Michael LOVELADY
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Abstract
An optical fiber endcap device may include an input facet spliced onto an input fiber and an output end through which counterpropagating light enters the optical fiber endcap device. The optical fiber endcap device further includes a plurality of angled facets that are arranged at respective angles relative to an axis of the optical fiber endcap device to reflect at least a portion of the counterpropagating light back through the output end of the optical fiber endcap device.
Claims20
An optical assembly, comprising:
- an input fiber;
- and
- an endcap device that comprises:
- an input facet spliced onto the input fiber;
- an output end through which counterpropagating light enters the endcap device;
- and
- a plurality of angled facets arranged at respective angles relative to an axis of the endcap device to reflect at least a portion of the counterpropagating light back through the output end.
4 more elements
A fiber endcap, comprising:
- an input facet spliced onto an input fiber;
- a cylindrical body portion having an output end through which counterpropagating light enters the fiber endcap;
- and
- three angled facets arranged at an angle in a range from 30° to 40° relative to an axis of the cylindrical body portion, and distributed symmetrically in a rotational direction with respect to the axis of the cylindrical body portion, to reflect the counterpropagating light through total internal reflection back through the output end.
1 more element
A fiber endcap, comprising:
- an input facet spliced onto an input fiber;
- a body portion having an output end through which counterpropagating light enters the fiber endcap;
- and
- a plurality of angled facets that are arranged at an angle relative to an axis of the body portion such that the counterpropagating light is reflected through total internal reflection back through the output end,
- wherein the fiber endcap has an internal total internal reflection acceptance angle based on the angle at which the plurality of angled facets are arranged relative to the axis of the fiber endcap and a refractive index of a material used to fabricate the fiber endcap at an operating wavelength of the counterpropagating light that enters the fiber endcap.
2 more elements
Dependencies are inferred from the claim text.